Special review class for true or false questions: name: grade: 1. Four small cubes of the same size can be combined into a big cube. ............................................... () 2. A cuboid with a length of 3.2 cm, a width of 3 cm and a height of 2 cm, the sum of its sides is (3.2+3+2) × 3 = 24.6 (cm3) .................................. () 3 ............................... () 5. A cuboid with equal length, width and height is a cube. .............. () 6. Natural numbers are either prime numbers or composite numbers. .............. () 7. The divisor of a number is finite. .......................... () 8. All numbers divisible by 2 are composite numbers. .......................... () 9. The maximum composite number less than 100 is 98. ............. ()10,48 can be divisible by 8 and 6 at the same time, so 48 is the least common multiple of 8 and 6. () 1 1, a cuboid has at most four faces with equal areas. ............... () 12, any natural number with at least two divisors. .............. () 13. If A is a multiple of B, then the greatest common divisor of A and B is B. .............. () 14. Put a cube with a surface area of 6 square decimeters on the ground with an area of 1 square decimeter. .............. () 15, the infusion bottle contains 500ml liquid medicine, and the volume of the infusion bottle is 500ml. ............. () 16, two cuboids with the same surface area must have the same volume. .............. () 17. In natural numbers, the number of prime numbers is less than the number of composite numbers. ............... () 18, the sum of two odd numbers must be even. ............... () 19, the least common multiple of two numbers must be the multiple of their greatest common divisor. ....................... () 20. When the side length of a cube is doubled, its volume is quadrupled. The side length of ............. () 2 1. cube is 6 cm, and its volume and surface area are equal. ............ () 22. Because 153=5 1×3, 5 1 and 3 are both prime factors of 153. ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Because 18=2×3×3, both 2 and 3 are divisors, and 18 is a multiple. ............... () 25. Natural numbers are either odd, even, prime or composite. ............... () 26. The sum of any two complex numbers must be a complex number. ............... () 27. It takes an average of 5 minutes to cut a rectangular piece of wood into two parts. If it is cut into 4 sections on average, it takes 15 minutes. () 28. Divide an apple into three parts, each part accounts for 13 of this apple. ............... () 29. The true score is always less than the false score. ............. () 30. If the number of boys is 34, the number of girls is 43. ............. () 3 1, the numerator and denominator of the simplest fraction have no common divisor. ............... () 32. In this score, a can be any integer. ............... () 33. Two consecutive nonzero natural numbers must be prime numbers. ....................... () 34. The prime factor of decomposition 24 is 24 = 2× 3× 4. ............... () 35. The divisor of a number must be less than a multiple of that number. ............. () 36. Because 5 and 7 have no common divisor, 5 and 7 are both prime numbers. ................ () 37. All nonzero even numbers are composite numbers. ............... () 38. The common multiple of two numbers must be greater than two numbers. ............... () 39. Any natural number has at least two divisors. .............. () 40. If A is a multiple of B, then the greatest common divisor of A and B is B. ............ () 4 1. Put a cube with a surface area of 6㎝2 on the ground with an area of 1㎝2. () 42. The infusion bottle contains 500 ml of liquid medicine, and the volume of the infusion bottle is 500 ml. () 43. Two cuboids with the same surface area must have the same volume. ............... () 44. Non-zero natural numbers are either prime numbers or composite numbers. ............... () 45. A multiple of a number must be greater than its divisor. ............... () 46. The product of two prime numbers must be a composite number. .............. () 47. A cuboid (excluding cubes) has at most 8 equilateral sides. ............... () 48. Even numbers greater than 2 are all composite numbers. ............... () 49. The product of two prime numbers must be a composite number. ...................... () 50, more than 3/7 less than 5/7, only 4/7. ............... () 5 1, the fraction with numerator greater than denominator must be a false fraction. ................ () 52. The volume and surface area of a cube 6 cm long are exactly the same. ............... () 53. The divisor of a number is less than a multiple of this number. ............... () 54. At least eight identical cubes are needed to form a larger cube. .............. () 55. A number can be divisible by both 2 and 3, and this number must be divisible by 6. ................ () 56. A cube 6 cm long has the same volume and surface area. ………………( )